Wrench



Sept. 2,2, 19H25.

' w. H; FlsHER warmen Filed Oct. 20. 1924 wPatenteclsept. 2,2, 192,5.v i i BAT ENT.toestaat@ `wILLIAiir if.` rlsiinn, "or AtirocivA.,`1=Eivivsvnvnma,` AslsfGNoR or oinfrnriain o wherein:

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fl WRENCH.

4 -\lplantation-md.october-20,1 1924; serial Nol 744,818;

To all. whom timmy concer/a.' Y Be it knownthat I, WILLIAM FrsHER, acitizengof therUnited' `States of America, residing at Altoona, iin therc'ounty` offBlair andv State `of Pennsylvania, vhave `invented new and'- useful1 Improvements" in Wrenches, of which `the follovvring-is-aspecifieation.`

The purpose of the? invent-ionfislto provide a wrench susceptible of use Awith av handle or with au brace and quickly adjustable to suit various sizes of nuts or bolt heads within its range. l v

l/Vith this purpose in View, the invention consists in the construction and combination o-f parts of which a preferred embodiment is illustrated in the accompanying drawings,

Figurel is aside invention.

Fig. 2 is an elevational view looking from a direction at right angles from that in which Fig.` 1 is viewed. y

Fig. 3 is a section on the by the linew of Fig. 1. l

Fig. 4 is a sectional viewon the plane indicated by the line 4--4 of Fig. 1.

`Figure 5 is a ysectional View on line 5-5 of Figure 1. l

Fig. 6 is an elevational view showing a modification wherein the lugs 17 are omitted. rlhe invention is shown as applied to a wrench of the socket` variety having the complemental work engaging elementsl and 2 mounted respectively on the crosssectionally semicircular jaw heads 3 and 4, having tongue and groove connections consisting of tongues 5 carried by the Jaw heads `3 and 4. It is obvio-us that the tongues 5 mayrfit into the grooves 6 frictionallyy tight in order to hold the work-engaging elements c0nnected to kthe jaw heads. It is also possible to connect the work-engaging elements to the jaw heads in any other wellknown manner, for instance by making the elevational view of the tongues and grooves 5 and 6 dovetailed, for' example, V-shaped. The heads are formed as integral parts of stems 7 and 8 having a slide connection consisting of a tongue 9 on the stem 7 which engages a slot 10 on the stem 8. The stems slidablyi. engage a slot or bifurcation 11 in the shank `12, a pin 14 being carried by the shank and spanning the slot at the outer end of the latter.` The pin constitutes a connecting means between the stems 7 and 8 and the shank and plane indicated the .stems arel respectively.` `provided throughywhich theipinpasses. 1i g oppositely disposed` inclined slots ,.15 and 16 e `The 4slotsin thestems being at;.loppiljisite` i inclinations, 1f obviously longitudinal *movement imparted to the stemsfwillserveito feflect. a lrelative lateral, movementj` of y' the two i anda. k"corresponding `movement vof "the heads Sland' 4' with aresultant movement of thexja-ws q1 an'df12.-ff"f :Movement of a the stems in one direction will, therefore, tend to separate the jaws and movement in the opposite direction will tend to closethem, the disposition ofthe slots 15 and` 16 being such kthat when the stems are completely housed in the slot 11, the yjaws are in their closed positionor the position for engaging a nut of the smallest diameter. y

To I preclude pivotal movement of `the stems and, therefore lateral` swinging movement of the jaws with `reference to the shank, lugs 17 are carried one by each stem i for contact with an inclined` surface18 `on the shank atV the open end of the slot 11; Where it is desired that `t-he jaws may have a pivotal connection with the shank to precludek swinging them at an angle thereto, the lugs may be omitted as in the modification shown in Fig. 6.`

A hole 19 is bored transversely through the shank for the `reception of a pin wrench when such a device is desired to operate the wrench, the shank being provided `further with a pyramidal terminal 20 for engagement by a brace chuck where a brace is used as the operating means. In using the wrench, the j aw heads 3 and 4 are moved lon itudi.-v

nally axially of theshank 12, in whic case i the slots 15 and 16, incooperating with the pin 14, will cause the stems of the jaw heads to slide laterallyrelativeto each other, in

whchjcase thework engaging elements will separate. Since the work engaging elements 1 and 2 are angular, they may cooperate to engage with the nut or the like, whereby the nut may be turned to remove it `from a is moved longitudinally of thestems 'Tand 8 and the pin 14 cooperating with the slots 15 and 16 will cause lthe jawjheads to again slide but in directions opposite to those previously mentioned and bring Vthe work engaging elements 1 and 2 toward each other in close engagement ywith `the nut. The

I bolt. After the work engaging elements receive the nut, the shank 12 of the .wrench` pressure kon the transverse pin `passing through theopeningor hole 19 will maintain the shank as moved to-Ward the javv heads and retain the Work engaging elements 1 and"2 agains't'the nu't to be (rotated. While this pressure. is being applied, 'the Wrench may be turned or rotated so as to unsorew the nut.

The invention having `been described, What is claimed as new and useful is: f .1an a Wrench, the combination With a substantially cylindrical shank `provided With a longitudinal bifurcation,;o1a-pair of ,jaws ,having :flat stems flatvvise :and slidablv engaging with yeach other :and kmountedfor axial ymovement in the biurcation :of 'the shank,Y the adjacent faces of ithefflat stems Will eect relative sliding movements of the stems, whereby nut or other Work-engaging felementst'on the jawsmay move toward and A from 'eahothen said 'shank having diagonally opposite inclined cam surfaces and the Stems o-n the jaws having lugs extending laterallyfinoppositedireotions and overlying l and engaging said Vinclined cam surfaces to insure guiding thezstemsfand effecting relative llz'ttelafl :movements fof -:they avvs,' Work engaging elements on `:they jaws, and 4means oarr-ied fbyrthe sh ank, whereby L'rotating nove- I'nent yaxially may fbe :imparted tto the shank, bearing endvvise :on #thet-shankfto. retain the elementsiniengagement with fthe work.

E ,Intestimony 'Whereoflafffix my Signature.

l' WILLIAM H. FISHER. 

